Metal-working hammer



FIG. 1 is a left-side elevational view of a metal-working hammer showing my new design; wherein the right-side elevational view is a mirror image thereof;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a metal-working hammer, as shown and described. 